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/* OpenSceneGraph example, osgcamera.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/AnimationPathManipulator>
#include <iostream>
class ModelHandler : public osgGA::GUIEventHandler
{
public:
ModelHandler():
_position(0) {}
typedef std::vector<std::string> Filenames;
Filenames _filenames;
unsigned int _position;
void add(const std::string& filename) { _filenames.push_back(filename); }
bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
{
osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
if (!viewer) return false;
if (_filenames.empty()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYUP):
{
if (ea.getKey()=='l')
{
osg::ref_ptr<osg::Node> model = osgDB::readNodeFile( _filenames[_position] );
++_position;
if (_position>=_filenames.size()) _position = 0;
if (model.valid())
{
viewer->setSceneData(model.get());
}
return true;
}
}
default: break;
}
return false;
}
bool _done;
};
void singleWindowMultipleCameras(osgViewer::Viewer& viewer)
{
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
unsigned int width, height;
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = width;
traits->height = height;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (gc.valid())
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
// need to ensure that the window is cleared make sure that the complete window is set the correct colour
// rather than just the parts of the window that are under the camera's viewports
gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
else
{
osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
}
unsigned int numCameras = 2;
double aspectRatioScale = 1.0;///(double)numCameras;
for(unsigned int i=0; i<numCameras;++i)
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport((i*width)/numCameras,(i*height)/numCameras, width/numCameras, height/numCameras));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::scale(aspectRatioScale,1.0,1.0));
}
}
void multipleWindowMultipleCameras(osgViewer::Viewer& viewer, bool multipleScreens)
{
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
unsigned int width, height;
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
unsigned int numCameras = 6;
double aspectRatioScale = (double)numCameras;
double translate_x = double(numCameras)-1;
for(unsigned int i=0; i<numCameras;++i, translate_x -= 2.0)
{
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->screenNum = multipleScreens ? i / 3 : 0;
traits->x = (i*width)/numCameras;
traits->y = 0;
traits->width = width/numCameras-1;
traits->height = height;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (gc.valid())
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
}
else
{
osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
}
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0, width/numCameras, height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrix::scale(aspectRatioScale, 1.0, 1.0)*osg::Matrix::translate(translate_x, 0.0, 0.0), osg::Matrix() );
}
}
class EnableVBOVisitor : public osg::NodeVisitor
{
public:
EnableVBOVisitor():
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
void apply(osg::Geode& geode)
{
for(unsigned int i=0; i<geode.getNumDrawables();++i)
{
osg::Geometry* geom = geode.getDrawable(i)->asGeometry();
if (geom)
{
osg::notify(osg::NOTICE)<<"Enabling VBO"<<std::endl;
geom->setUseVertexBufferObjects(true);
}
}
}
};
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
if (argc<2)
{
std::cout << argv[0] <<": requires filename argument." << std::endl;
return 1;
}
unsigned int numRepeats = 2;
if (arguments.read("--repeat",numRepeats) || arguments.read("-r",numRepeats) || arguments.read("--repeat") || arguments.read("-r"))
{
bool sharedModel = arguments.read("--shared");
bool enableVBO = arguments.read("--vbo");
osg::ref_ptr<osg::Node> model;
if (sharedModel)
{
model = osgDB::readNodeFiles(arguments);
if (!model) return 0;
if (enableVBO)
{
EnableVBOVisitor enableVBOs;
model->accept(enableVBOs);
}
}
osgViewer::Viewer::ThreadingModel threadingModel = osgViewer::Viewer::AutomaticSelection;
while (arguments.read("-s")) { threadingModel = osgViewer::Viewer::SingleThreaded; }
while (arguments.read("-g")) { threadingModel = osgViewer::Viewer::CullDrawThreadPerContext; }
while (arguments.read("-d")) { threadingModel = osgViewer::Viewer::DrawThreadPerContext; }
while (arguments.read("-c")) { threadingModel = osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext; }
for(unsigned int i=0; i<numRepeats; ++i)
{
osg::notify(osg::NOTICE)<<"+++++++++++++ New viewer ++++++++++++"<<std::endl;
{
osgViewer::Viewer viewer;
viewer.setThreadingModel(threadingModel);
if (sharedModel) viewer.setSceneData(model.get());
else
{
osg::ref_ptr<osg::Node> node = osgDB::readNodeFiles(arguments);
if (!node) return 0;
if (enableVBO)
{
EnableVBOVisitor enableVBOs;
node->accept(enableVBOs);
}
viewer.setSceneData(node.get());
}
viewer.run();
}
osg::notify(osg::NOTICE)<<"------------ Viewer ended ----------"<<std::endl<<std::endl;
}
return 0;
}
std::string pathfile;
osg::ref_ptr<osgGA::AnimationPathManipulator> apm = 0;
while (arguments.read("-p",pathfile))
{
apm = new osgGA::AnimationPathManipulator(pathfile);
if (!apm.valid() || !(apm->valid()) )
{
apm = 0;
}
}
osgViewer::Viewer viewer(arguments);
while (arguments.read("-s")) { viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded); }
while (arguments.read("-g")) { viewer.setThreadingModel(osgViewer::Viewer::CullDrawThreadPerContext); }
while (arguments.read("-d")) { viewer.setThreadingModel(osgViewer::Viewer::DrawThreadPerContext); }
while (arguments.read("-c")) { viewer.setThreadingModel(osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext); }
bool limitNumberOfFrames = false;
unsigned int maxFrames = 10;
while (arguments.read("--run-till-frame-number",maxFrames)) { limitNumberOfFrames = true; }
// alternative viewer window setups.
while (arguments.read("-1")) { singleWindowMultipleCameras(viewer); }
while (arguments.read("-2")) { multipleWindowMultipleCameras(viewer, false); }
while (arguments.read("-3")) { multipleWindowMultipleCameras(viewer, true); }
if (apm.valid()) viewer.setCameraManipulator(apm.get());
else viewer.setCameraManipulator( new osgGA::TrackballManipulator() );
viewer.addEventHandler(new osgViewer::StatsHandler);
viewer.addEventHandler(new osgViewer::ThreadingHandler);
std::string configfile;
while (arguments.read("--config", configfile))
{
osg::notify(osg::NOTICE)<<"Trying to read config file "<<configfile<<std::endl;
osg::ref_ptr<osg::Object> object = osgDB::readObjectFile(configfile);
osgViewer::View* view = dynamic_cast<osgViewer::View*>(object.get());
if (view)
{
osg::notify(osg::NOTICE)<<"Read config file succesfully"<<std::endl;
}
else
{
osg::notify(osg::NOTICE)<<"Failed to read config file : "<<configfile<<std::endl;
return 1;
}
}
while (arguments.read("--write-config", configfile)) { osgDB::writeObjectFile(viewer, configfile); }
if (arguments.read("-m"))
{
ModelHandler* modelHandler = new ModelHandler;
for(int i=1; i<arguments.argc();++i)
{
modelHandler->add(arguments[i]);
}
viewer.addEventHandler(modelHandler);
}
else
{
// load the scene.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
if (!loadedModel) loadedModel = osgDB::readNodeFile("cow.osgt");
if (!loadedModel)
{
std::cout << argv[0] <<": No data loaded." << std::endl;
return 1;
}
viewer.setSceneData(loadedModel.get());
}
viewer.realize();
unsigned int numFrames = 0;
while(!viewer.done() && !(limitNumberOfFrames && numFrames>=maxFrames))
{
viewer.frame();
++numFrames;
}
return 0;
}
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